and other American animators. In several of the Astro Boy stories, the first few pages were in color.

Tezuka had a "Star System" of characters, in which characters from his other works played roles in Astro Boy. Similarly, several characters in Astro Boy appear in his other works. Tezuka developed "a type of dialog with his readers", since he developed so many stories during his lifetime. Tezuka also had a habit of introducing nonsensical characters at random moments in order to lighten